Take apart software with Tom
Using the concepts we looked at in A For Loop Without a For Loop and A Simple Infinite Loop, we can call a different function rather than calling the same one in a loop. In this post, we are going to call a function within main(), by overwriting main()'s return address and replacing it with the … Continue reading A Call Without a Call
Usually, you don't want to have something looping forever and ever. It serves no purpose. There has to be a condition when whatever needs to be done is finished and the loops stops. Unless we want to write a program to specifically do something it's not supposed to. Which is precisely what we will do … Continue reading A Simple Infinite Loop
Recently, I was working on a VMKernel core dump in which GDB's backtrace information for some threads was not reliable. This was due to a data structure holding the register values not having been updated before the kernel crashed. However, since whatever was running in the affected threads was probably still writing to the call … Continue reading Walk the Call Stack
Everybody Loves GDB 